Three centuries of the slave trade had taught Europeans that Africans were inferior, and that helped to justify imperialism in the minds of many Europeans. Even slave abolitionists contributed to this by arguing that Africans had to be "protected" from slavers; i.e. they couldn't take care of themselves.
The correct answer is record keeping
the answer is the angering of southern states over the exaggerated detail of slavery
Answer:
How did once-dominant Mexico lose the Mexican-American War? Mexico was essentially broke. The country was racked by financial instability as the war began in 1846. America's blockade of Mexican ports worsened an already difficult situation, as Mexico couldn't import and export goods, or levy taxes on imports. who won the war of EL Brazito Battle of El Brazito
Date December 25, 1846
Location near Las Cruces, New Mexico
Result United States victory